Clamp



FIG. 1 is an isometric view of a preferred embodiment of a clamp illustrating the ornamental design;

FIG. 2 is a rear elevational view of the preferred embodiment;

FIG. 3 is a front elevational view of the preferred embodiment;

FIG. 4 is a side elevational view of one side of the preferred embodiment;

FIG. 5 is a side elevational view of the other side of the preferred embodiment;

FIG. 6 is a top plan view of the preferred embodiment; and,

FIG. 7 is a bottom view of the preferred embodiment.

The broken line showing a pivot structure is for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a clamp, as shown and described. 